scholarly journals Protection of intensive apple orhards from phytophages complex in steppe zone of Ukraine

Agrology ◽  
2021 ◽  
Vol 4 (3) ◽  
pp. 103-107
Author(s):  
L. P. Bandura ◽  
S. A. Chernykh ◽  
Y. P. Yanovskyi
Keyword(s):  
Bark Beetle ◽  
Bark Beetles ◽  
Steppe Zone ◽  
Modern Technology ◽  
Tube Worms ◽  
Protection Systems ◽  
Xyleborus Dispar ◽  
Production Areas ◽  
Fruit Plantations

According to long-term surveys of apple plantations in Ukraine, they are da maged by an unpaired western bark beetle (Xyleborus dispar F.). The share of this pest colonizing perennial plantations in Ukraine is about 30%, and there is also a tendency of spreading colonization of this type of production tracts over fruit plantations. The prevalence of bark beetle in production areas of orchards has increased significantly in recent years. Unpaired pest, unlike many other species of bark beetles, completely destroys healthy trees. The increase in the number and harmfulness of odd western bark beetle is associated with climate change, the use of various protection systems, etc. Nowadays measures to reduce the number of this species consisted only of a mechanical technique (cutting and burning dam-aged trees) and spraying of garden plantings in the phase of “swelling of the buds ‒ beginning of budding” with old insecticides of second generation (metaphos, chlorophos, carbophos, etc). Pruning and burning damaged trees are an ineffective measures to reduce the number of pests in orchards. The expediency of testing a number of modern insecticides is urgent and effective against a complex of phytophages in the “green cone” phase ‒ “ Rose bud” (beetle, goose, budworm, apple blossom beetle, aphids, leafworms) ‒ “end of flowering” (leafworms, aphids) and can be effective against the western unpaired bark beetle. The basis was the du-ration of action and the peculiarities of the mechanism of action of these insecticides (contact intestinal action ‒ Aktara 240 SC, HP, Mospilan, P. P., Calypso 480 SC , etc. and contact, par-tially systemic action with fumigation effect ‒ Bi‑58 new, etc., Pirinex Super, etc., Danadim stable, etc., Danadim Mix, etc., Fufanon 570, etc.). The use of the drugs mentioned above (for double treatment of plantings) demonstrated high technical efficiency against openly living phytophages (for the first treatment of plantations ‒ against aphids, leafworms, garden wee-vils and tube worms, for the second treatment ‒ against aphids, leafworms), which amounted to 91,3‒99,2%. The western unpaired bark beetle (Xyleborus dispar F.) is a permanent species in the industrial areas of the apple tree. And therefore, protecting trees from it in industrial plantings should be an integral part of modern technology for obtaining fruit products. Un-doubtedly, the application of the complex of insecticides Bi‑58 new, к.е. (2,0 l/ha), Pirinex Super, к.е. (1,25 l/ha), Danadim stable, etc. (2,0 l/ha), Danadim Mix, etc. (2,0 l/ha), Fufanon 570, E.C. (2,0 l/ha) is a highly effective method for reducing the harmfulness of the western unpaired bark beetle in industrial plantations of apple trees, an economically beneficial meth-od in the modern intensive protection technologies.

scholarly journals Emergence levels of pine shoot beetles from roundwood piles of Scots pine and the cascading damage in the surrounding forests

Silva Fennica ◽  
2021 ◽  
Vol 55 (5) ◽  
Author(s):  
Markus Melin ◽  
Tiina Ylioja ◽  
Leena Aarnio ◽  
Katri Hamunen ◽  
Seppo Nevalainen ◽  
...  
Keyword(s):  
Pinus Sylvestris ◽  
Scots Pine ◽  
Bark Beetle ◽  
Bark Beetles ◽  
Coniferous Forests ◽  
The Future ◽  
Forest Legislation ◽  
Pine Shoot Beetles

Bark beetles are amongst the most aggressive pest agents of coniferous forests. Due to this, many boreal countries have designated laws aiming to lower the risk of bark beetle epidemics. Finland’s forest legislation has pre-emptive measures targeted against bark beetles, and for Scots pine ( L.), the law concerns pine shoot beetles ( spp.). This study used data collected around 25 piles of Scots pine roundwood that were harvested in the winter but left in the forest until the following November. Thus, the pine shoot beetles were able to use the piles for breeding. We assessed the number of emerged insects from the piles and the cascading damage they caused in the surrounding forests. All roundwood piles, regardless of their volume, were used by the beetles for breeding. Highest densities of beetle exit holes were found from the parts of the log with thick and intact bark. If the bark of the log was damaged by the harvester head, the number of beetles decreased significantly. Depending on the volume of the roundwood pile, the cascading damage (fallen shoots) was noticeable up to ca. 40–60 m from the roundwood pile. Storing of piles smaller than 50 m did not cause excess damage. The number of fallen shoots per tree was generally below the known thresholds for when growth losses can occur. However, the study was conducted in mature forests, and it can be assumed that the recorded damage levels would severely affect the growth of young pines, raising the question of where to store the roundwood. As with other bark beetles, the role of beetles as damage agents may change in the future, but based on this as well as past studies, the species can be viewed as a notable damage agents only around long-term wood storage sites in the current northern conditions.Pinus sylvestrisTomicus3Tomicus

Ecological restoration for biodiversity conservation triggers response of bark beetle pests and their natural predators

2020 ◽  
Author(s):  
Anne-Maarit Hekkala ◽  
Simon Kärvemo ◽  
Martijn Versluijs ◽  
Jan Weslien ◽  
Christer Björkman ◽  
...  
Keyword(s):  
Ecological Restoration ◽  
Bark Beetle ◽  
Boreal Forests ◽  
Bark Beetles ◽  
Large Scale ◽  
Prescribed Burning ◽  
Gap Cutting ◽  
Population Sizes ◽  
And Function

Abstract The restoration of forest structure and function is increasingly being used in boreal forests in order to halt the loss of biodiversity. Often ecological restoration is aimed at increasing the volume of dead and dying trees to enhance the biodiversity of deadwood-dependent organisms, but it may also increase population sizes of pest bark beetle species, even several years following restoration. Herein, we used a large-scale restoration experiment in Northern Sweden to assess the 5 years post-restoration effects of restorative gap cutting and prescribed burning on the populations of a set of economically harmful pest bark beetles (Ips typographus, Polygraphus poligraphus, Tomicus piniperda and Pityogenes chalcographus) and the most important predators of bark beetles, Thanasimus spp. In addition, we assessed the effects of forest stand characteristics at stand and landscape scale on the abundance of I. typographus. Five years post-restoration, gap-cut stands supported the highest abundances of P. poligraphus and contained the highest count of spruce trees newly attacked by bark beetles. By contrast, prescribed burning generally sustained the lowest abundances of pest bark beetles, especially I. typographus and P. poligraphus, and the highest abundance of their natural predators Thanasimus spp. The population abundance of I. typographus was also positively affected by the area of clear cuts within a 500 m radius from the stand. In conclusion, prescribed burning appears to be a safer method for ecological restoration than gap cutting in the long-term. According to our results, a risk of a local bark beetle outbreak still remains 5 years following the initiation of ecological restoration treatments on spruce-dominated mature gap-cut stands.

scholarly journals CLIMATIC FACTORS INFLUENCING THE VULNERABILITY OF SCOTS PINE TO BARK BEETLES ATTACKS IN THE CENTRAL POLISSYA

2018 ◽  
pp. 119-127
Author(s):  
O. Y. Andreieva
Keyword(s):  
Scots Pine ◽  
Bark Beetle ◽  
Bark Beetles ◽  
Climatic Factors ◽  
Thermal Conditions ◽  
Growing Season ◽  
Forest Steppe ◽  
Index Value ◽  
Term Data

The aim of the research was to evaluate the changes of climate factors in Central Polissya, which can contribute to Scots pine vulnerability to bark beetle attacks and increase of their population density. In 2005–2018 an average annual and growing season air temperature increased, especially in the southern part of the region. On temperature conditions until 2009, multivoltine bark beetles were possible to develop only one full generation. Thermal conditions in Scots pine stands in the vicinity of 5 meteorological stations in 2010, three meteorological stations in 2012, two meteorological stations in 2015, one meteorological station in 2016, and five meteorological stations in 2018 were favorable for the development two bark beetle generations. Average growing season precipitation for 2005–2018 was inferior to the long-term data for all analyzed meteorological stations, except Olevsk. Average G. T. Selyaninov hydrothermal index value fell to the Forest-steppe “standard” in 2005 and 2009 and to the Steppe “standard” in 2015. Such a decrease is unfavorable for forest trees, which are adapted to the high humidity of air and soil.

scholarly journals Drivers of Spruce Bark Beetle (Ips typographus) Infestations on Downed Trees after Severe Windthrow

Forests ◽  
2020 ◽  
Vol 11 (12) ◽  
pp. 1290
Author(s):  
Branislav Hroššo ◽  
Pavel Mezei ◽  
Mária Potterf ◽  
Andrej Majdák ◽  
Miroslav Blaženec ◽  
...  
Keyword(s):  
Solar Radiation ◽  
Bark Beetle ◽  
Bark Beetles ◽  
Ips Typographus ◽  
Wind Damage ◽  
Stem Length ◽  
Local Conditions ◽  
Spruce Bark Beetle ◽  
Management Actions ◽  
Spruce Bark

Research Highlights: Bark beetles are important agents of disturbance regimes in temperate forests, and specifically in a connected wind-bark beetle disturbance system. Large-scale windthrows trigger population growth of the European spruce bark beetle (Ips typographus L.) from endemic to epidemic levels, thereby allowing the killing of Norway spruce trees over several consecutive years. Background and Objectives: There is a lack of evidence to differentiate how outbreaks are promoted by the effects of environmental variables versus beetle preferences of trees from endemic to outbreak. However, little is known about how individual downed-tree characteristics and local conditions such as tree orientation and solar radiation affect beetle colonization of downed trees. Materials and Methods: To answer this question, we investigated the infestation rates and determined tree death categories (uprooted, broken, and stump) in wind-damaged areas in Western Tatra Mts. in Carpathians (Slovakia) from 2014–2016, following a windthrow in May 2014. In total, we investigated 225 trees over eight transects. For every tree, we measured its morphological (tree height, crown characteristics), environmental (solar radiation, terrain conditions, trunk zenith), temporal (time since wind damage), and beetle infestation (presence, location of attack, bark desiccation) parameters. We applied Generalized Additive Mixed Models (GAMM) to unravel the main drivers of I. typographus infestations. Results: Over the first year, beetles preferred to attack broken trees and sun-exposed trunk sides over uprooted trees; the infestation on shaded sides started in the second year along with the infestation of uprooted trees with lower desiccation rates. We found that time since wind damage, stem length, and incident solar radiation increased the probability of beetle infestation, although both solar radiation and trunk zenith exhibited nonlinear variability. Our novel variable trunk zenith appeared to be an important predictor of bark beetle infestation probability. We conclude that trunk zenith as a simple measure defining the position of downed trees over the terrain can anticipate beetle infestation. Conclusions: Our findings contribute to understanding of the bark beetle’s preferences to colonize windthrown trees in the initial years after the primary wind damage. Further, our findings can help to identify trees that are most susceptible to beetle infestation and to prioritize management actions to control beetle population while maintaining biodiversity.

INFESTATION OF CERATOCYSTIS WAGENERI-INFECTED PONDEROSA PINES BY BARK BEETLES (COLEOPTERA: SCOLYTIDAE) IN THE CENTRAL SIERRA NEVADA

1980 ◽  
Vol 112 (7) ◽  
pp. 725-730 ◽  
Author(s):  
D. J. Goheen ◽  
F. W. Cobb
Keyword(s):  
Sierra Nevada ◽  
Bark Beetle ◽  
Ponderosa Pine ◽  
Bark Beetles ◽  
Dendroctonus Brevicomis ◽  
Disease Category ◽  
The Relationship ◽  
Periodic Examination ◽  
Apparently Healthy

AbstractThe relationship between bark beetle infestation of ponderosa pine and severity of infection by Ceratocystis wageneri was investigated by closely monitoring 256 trees (136 apparently healthy, 60 moderately diseased, and 60 severely diseased at initiation of study) for beetle infestation from summer 1972 to fall 1975. Disease ratings were updated by periodic examination, and some trees changed disease category during the study. Ninety trees were infested by Dendroctonus brevicomis, D. ponderosae, or both, five by buprestids alone, and one tree died from effects of the pathogen alone. Sixty-two of the beetle-infested trees were severely diseased at time of infestation, 25 were moderately diseased, and only three were apparently healthy. Thus, the results showed that bark beetles were much more likely to infest infected than healthy trees. Among diseased trees, those with advanced infections were most likely to be infested. There was evidence that buprestids (especially Melanophila spp.) and possibly Ips spp. attacked diseased trees prior to Dendroctonus spp. infestation.

ATTRACTION OF HYLOBIUS PALES (HERBST) (COLEOPTERA: CURCULIONIDAE) TO PHEROMONES OF BARK BEETLES (COLEOPTERA: SCOLYTIDAE)

1990 ◽  
Vol 122 (3) ◽  
pp. 423-427 ◽  
Author(s):  
Thomas W. Phillips
Keyword(s):  
Field Experiment ◽  
Bark Beetle ◽  
Bark Beetles ◽  
Suitable Host ◽  
Male And Female ◽  
Pine Weevil ◽  
Ips Calligraphus ◽  
Hylobius Pales ◽  
Host Resource

AbstractResults of a field experiment indicate that adults of the pine weevil Hylobius pales (Herbst) respond to pheromones of bark beetles. Each sex of H. pales was more attracted to traps baited with the combination of a pine bolt infested with male Ips calligraphus Germar plus the synthetic Dendroctonus Erichson pheromones frontalin and exo-brevicomin, than to traps baited with pine bolts alone. The combined numbers of male and female H. pales caught in traps baited only with Ips calligraphus-infested bolts were significantly greater than numbers caught in traps baited with uninfested control bolts. The attraction of H. pales to bark beetle pheromones may represent a kairomonal response in which weevils exploit semiochemicals from other species that signify a suitable host resource.

Impacts of European spruce bark beetle infestations on Norway spruce BVOC emissions

2021 ◽  
Author(s):  
Erica Jaakkola ◽  
Anna Maria Jönsson ◽  
Per-Ola Olsson ◽  
Maj-Lena Linderson ◽  
Thomas Holst
Keyword(s):  
Climate Change ◽  
Drought Stress ◽  
Norway Spruce ◽  
Bark Beetle ◽  
Bark Beetles ◽  
Atmospheric Environment ◽  
Strong Increase ◽  
Healthy Tree ◽  
Spruce Bark Beetle ◽  
Spruce Bark

<p>Tree killing by spruce bark beetles (<em>Ips typographus</em>) is one of the main disturbances to Norway spruce (<em>Picea abies</em>) forests in Europe and the risk of outbreaks is amplified by climate change with effects such as increased risk of storm felling, tree drought stress and an additional generation of spruce bark beetles per year<sup>[1]</sup>. The warm and dry summer of 2018 triggered large outbreaks in Sweden, the increased outbreaks are still ongoing and affected about 8 million m<sup>3</sup> forest in 2020<sup>[2]</sup>. This is the so far highest record of trees killed by the spruce bark beetle in a single year in Sweden<sup>[2]</sup>. In 1990-2010, the spruce bark beetle killed on average 150 000 m<sup>3</sup> forest per year in southern Sweden<sup>[3]</sup>. Bark beetles normally seek and attack Norway spruces with lowered defense, i.e. trees that are wind-felled or experience prolonged drought stress<sup>[4]</sup>. However, as the number of bark beetle outbreaks increase, the risk of attacks on healthy trees also increase<sup>[5]</sup>. This causes a higher threat to forest industry, and lowers the possibilities to mitigate climate change in terms of potential decreases in carbon uptake if the forests die<sup>[4,5]</sup>. Norway spruce trees normally defend themselves by drenching the beetles in resin<sup>[6]</sup>. The resin in turn contains different biogenic volatile organic compounds (BVOCs), which can vary if the spruce is attacked by bark beetles or not<sup> [4,6]</sup>. The most abundant group of terpenoids (isoprene, monoterpenes and sesquiterpenes), is most commonly emitted from conifers, such as Norway spruce<sup>[7,8]</sup>. The aim of this study was to enable a better understanding of the direct defense mechanisms of spruce trees by quantifying BVOC emissions and its composition from individual trees under attack</p><p>To analyze the bark beetles’ impact on Norway spruce trees a method was developed using tree trunk chambers and adsorbent tubes. This enables direct measurements of the production of BVOCs from individual trees. Three different sites in Sweden, with different environmental conditions were used for the study and samples were collected throughout the growing season of 2019. After sampling, the tubes were analyzed in a lab using automated thermal desorption coupled to a gas chromatograph and a mass spectrometer to identify BVOC species and their quantity.</p><p>The preliminary results show a strong increase in BVOC emissions from a healthy tree that became infested during the data collection. The finalized results expect to enable better understanding of how spruce trees are affected by insect stress from bark beetles, and if bark beetle infestation will potentially result in increased carbon emission in the form of BVOCs.</p><p><strong>References</strong></p><p>[1] Jönsson et al. (2012). Agricultural and Forest Meteorology 166: 188–200<br>[2] Skogsstyrelsen, (2020). https://via.tt.se/pressmeddelande/miljontals-granar-dodades-av-granbarkborren-2020?publisherId=415163&releaseId=3288473<br>[3] Marini et al. (2017). Ecography, 40(12), 1426–1435.<br>[4] Raffa (1991). Photochemical induction by herbivores. pp. 245-276<strong><br></strong>[5] Seidl, et al. (2014). Nature Climate Change, 4(9), 806-810. <br>[6] Ghimire, et al. (2016). Atmospheric Environment, 126, 145-152.<br>[7] Niinemets, U. and Monson, R. (2013). ISBN 978-94-007-6606-8<br>[8] Kesselmeier, J. and Staudt, M. (1999). Journal of Atmospheric Chemistry, 33(1), pp.23-88</p>

Failure of ovarian development in the Douglas-fir bark beetle, Dendroctonus pseudotsugae; an analysis of gut proteases and female-specific proteins

1971 ◽  
Vol 49 (7) ◽  
pp. 1021-1024 ◽  
Author(s):  
T. S. Sahota
Keyword(s):  
High Activity ◽  
Bark Beetle ◽  
Methyl Ether ◽  
Bark Beetles ◽  
Ovarian Development ◽  
Proteolytic Enzymes ◽  
Douglas Fir ◽  
Dendroctonus Pseudotsugae ◽  
Specific Proteins ◽  
Female Specific

The failure of ovarian development in Douglas-fir bark beetles denied of their natural gallery environment and maintained on host bark chips was investigated. Such insects possessed a high activity of proteolytic enzymes in their guts but relatively small amounts of female-specific proteins both in haemolymph and the oocytes. Topical application of farnesyl methyl ether did not increase the activity of gut proteases but resulted in increased amounts of female-specific proteins in haemolymph and ovaries. Thus it appears that the Douglas-fir bark beetles maintained on bark chips do not suffer from an inability to break down the ingested proteins, but synthesize and transfer less than normal amounts of female-specific proteins to the developing oocytes.

scholarly journals Tourist enterprise marketing complex: international and national aspect

2021 ◽  
pp. 124-127
Author(s):  
О.В. Птащенко ◽  
В.А. Вовк
Keyword(s):  
Development Strategy ◽  
Modern Technology ◽  
Machine Building ◽  
Enterprise Management ◽  
Goods And Services ◽  
Marketing Activities ◽  
Marketing Variables ◽  
Business Entities ◽  
The Right

The main features of the marketing complex for the enterprises of the tourist branch are considered in the article. In a market economy, the concept of marketing, as part of improving enterprise management, becomes an integral part of its activities. With the help of a number of controlled marketing variables, business entities can influence customers, stimulate them, encouraging them to certain, desirable for the company actions in the market until the purchase. One of the elements of the marketing complex is the brand. Increasingly, it is important to use it as one of the most important marketing factors that can ensure the success of the company in the market. To a large extent, this success is due to choosing the right branding strategy. This choice, as well as the positioning and development strategy of the brand directly depend on the chosen variety. In addition, it should be noted that the purpose of marketing is not only to benefit companies, but also to build long-term relationships with consumers, meet their demands, improve the quality of goods and services, improve the conditions of their acquisition. It should also be noted that the formation of marketing activities at the enterprise today is impossible without a focus on modern technology. Such technologies include Internet marketing as a modern way of building a business. Principles of tourism marketing: constant search and maximum respect for the consumer, focus on his needs and requirements, which provide the market is not goods and services, and ways to solve consumer problems; flexibility in achieving the set goal by adapting to the requirements of the market with a simultaneous targeted impact on it; a comprehensive approach to the development of marketing plans, which involves the use not of individual marketing activities, and a set of marketing, a combination of individual elements which allows you to achieve a certain goal; focus on the long-term prospects of the enterprise. Thus, the main purpose of each enterprise is to achieve profitability and stability of services. Today it is possible to achieve only through the introduction of basic principles of marketing and the formation of a comprehensive mechanism of marketing activities. At the same time, the high cost of enterprises, for example, machine-building industry, agricultural machinery enterprises should be compensated by the introduction of modern advanced production technologies, rational use of fundamentally new materials, introduction of modern technological policy, including marketing and work aimed at improving skills. All this once again confirms the importance of marketing management today and as a consequence of the constant introduction of the latest marketing tools.

scholarly journals Effects of forest roads on Ips sexdentatus infestation in black pine forest

2018 ◽  
Vol 6 (7) ◽  
pp. 828
Author(s):  
Gonca Ece Özcan ◽  
Korhan Enez ◽  
Burak Arıcak
Keyword(s):  
Bark Beetle ◽  
Bark Beetles ◽  
Forest Ecosystems ◽  
Significant Risk ◽  
Pine Forests ◽  
Slope Aspect ◽  
Black Pine ◽  
Forest Roads ◽  
Forest Road ◽  
Ips Sexdentatus

Forest roads are important transportation equipment through forested areas in the rugged, mountainous terrain of northern Turkey. Forest roads harm forest ecosystems due to both the manner in which they are established and how they are used afterwards. Damage to trees that occur during road construction through forests stresses trees, which facilitates outbreaks of bark beetle populations. Bark beetles are significant risk to the health and productivity of Turkish pine forests and to pine forests worldwide. In particular, Ips sexdentatus (Boerner) (Coleoptera, Curculionidae, Scolytinae) is a particularly destructive species of bark beetle in Turkish forests. Their damage to coniferous trees threatens the sustainability of the forest ecosystems. This study primarily aims to assess the intensity of damage that I. sexdentatus inflicts on Pinus nigra J.F.Arnold stands relative to several parameters: the distance to the nearest forest road, aspect (shady - sunny), slope (0–15% or >15%), and other stand characteristics. In this study, we show how damage by an I. sexdentatus infestation in pure black pine stands varies with distance to forest roads and in situ edaphic factors. We sampled 45 plots (400 m2 each), slope, aspect and distances to the nearest forest road was determined using ArcGIS software and the region’s road network overlays. Results showed that trees located within 100 m from the nearest forest road were the most severely damaged ones. The intensity of I. sexdentatus damage was about 16% in a hectare. Trees that were in 16–20 cm diameter class were damaged more often. I. sexdentatus damage did not show any significant correlation with the slope, aspect or degree of canopy closure.

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